Custom 450 Forged Steel — China Manufacturer (XM-25, UNS S45000, Alloy 450)
- Same corrosion resistance as AISI 304 stainless steel
- Tensile strength: 965–1210 MPa | Yield strength: Min 830 MPa
- Charpy impact: Min 68 J | Brinell hardness: 302–363 HB
- According to ASTM A564 (XM-25) and AMS 5773E
- 30 kg to 30,000 kg per piece | Capacity: 120,000 tonnes/year
- Lead time: Standard 2–4 weeks | Fully custom 4–6 weeks
As a professional Chinese manufacturer of Custom 450 material — also known as XM-25, ASTM A564 XM-25, UNS S45000, and Alloy 450 — Jiangsu Liangyi Co., Limited can forge them into open die and seamless rolled rings. We have more than 25 years of manufacturing experience, we have shipped custom-forged Alloy 450 forgings to clients all over the world. They are widely used in the pulp and paper, nuclear energy, aerospace, chemical industries.
Our Custom 450 forged steel products have good corrosion resistance, moderate-to-high strength, and good fabricability, all these make sure they can also work well in the strictest industries. We promise good quality and on-time delivery for almost every order.
What Is Custom 450 Forged Steel? (XM-25, UNS S45000, Alloy 450)
Custom 450, also known as XM-25, UNS S45000, and Alloy 450, is a martensitic age-hardenable (precipitation-hardening) stainless steel developed as an upgrade to standard 410 stainless steel. It has the following characteristics:
- Same corrosion resistance as AISI 304 stainless steel — due to its higher nickel content (6–7 wt.%) and chromium content (14–16 wt.%)
- Moderate strength better than annealed 410 SS — yield strength above 689 MPa (100 ksi) in the annealed condition, rising to over 830 MPa after aging
- Single-step aging can achieve full mechanical properties — simpler and more cost-effective heat treatment than multi-step processes
- Good fabricability and machinability — machinable in both annealed and aged conditions
Custom 450 was originally developed by Carpenter Technology Corporation as per ASTM A564 (type XM-25) and AMS 5773E. It is the best material for forgings used in nuclear and aerospace industries that have higher requirements on strength, toughness, and corrosion resistance.
Custom 450 Forged Steel Shapes Available (XM-25, UNS S45000)
To meet different clients' needs, Jiangsu Liangyi offers a full range of shapes. All products are produced as per ASTM A564 (XM-25) and AMS 5773E standards:
- Round bars, square bars, flat bars, rectangular bars, and rods
- Seamless rolled forged rings (all diameters)
- Hubs, housings, shells, sleeves, bushings, and hollow bars
- Discs, blocks, and steel plates
- Pipes, tubes, casings, and housings
- Fully custom open die forging parts — manufactured per client drawings and technical manual
Custom 450 Forged Steel Applications (XM-25, UNS S45000, Alloy 450)
Custom 450 (XM-25, UNS S45000) forged steel is the best material for critical parts in many specialized industries. The following are some forgings we supplied for each industry:
Power Generation (Gas/Steam Turbines & Boilers)
Custom 450 forged steel is widely used in gas and steam turbine components and boiler systems in the power generation industry, the following are some of the products:
- Turbine blades and flat/rectangular bars for gas compressors
- Turbine disks, impellers, and blisks
- Double-headed studs, fasteners, and bolts
- Guide rings, seal rings, and casing rings (seamless rolled rings)
- Boiler and heat exchanger parts: tubes, shells, tube sheets, and nozzles
- Reactor and heater components
Case Study 1 — European Gas Power Plant: Jiangsu Liangyi supplied Custom 450 (UNS S45000) forged turbine guide rings and seal rings for a European gas power plant. We made them as per the client's drawings using ESR melting and proper heat treatment. After more than 3 years of use, the parts still have good resistance to high-temperature corrosion and have reduced maintenance costs by 20%.
Case Study 2 — Domestic Thermal Power Plant: Jiangsu Liangyi provided XM-25 (Custom 450) forged boiler tube sheets and nozzles for a domestic thermal power plant. The forgings were manufactured to ASTM A564 standards, achieved a tensile strength of up to 1,150 MPa, withstood high-pressure operating conditions, and passed third-party NDT inspection with full traceability reports.
Pumps & Valves — XM-25 / UNS S45000 Forged Components
Our XM-25 / UNS S45000 pump and valve parts can withstand harsh operating conditions, work well in stringent fluid-handling applications. Below are some main products:
- Pump cases, impellers, wear rings, and pump shafts
- Valve bonnets, valve bodies, valve stems, and valve discs
Case Study 3 — Southeast Asian Chemical Pump Manufacturer: Jiangsu Liangyi produced XM-25 / UNS S45000 forged valve bodies and stems for a Southeast Asian chemical pump manufacturer. The finished parts have good corrosion resistance in strong acid-base environments, and offer a service life 1.5 times longer than standard stainless steel alternatives.
Nuclear, Chemical, Aerospace & Pulp/Paper Industries
Apart from power generation and fluid handling, Custom 450 (XM-25, UNS S45000, Alloy 450) forged steel also works well in other critical industries:
- Nuclear energy: Pressure vessel parts and containment rings (Alloy 450 nuclear forgings)
- Chemical: Corrosion-resistant structural parts and equipment housings
- Aerospace: Aircraft structural connectors and high-strength fasteners
- Pulp & paper: Corrosion-resistant rolls and treatment equipment
Case Study 4 — Middle Eastern Nuclear Power Plant: Jiangsu Liangyi supplied Alloy 450 (UNS S45000) seamless rolled rings for pressure vessel use at a Middle Eastern nuclear power plant. The raw material met ASTM E45 Method D cleanliness standards with a prior austenitic grain size of ASTM No. 4. The forgings have been working safely and stably in nuclear radiation environments.
Case Study 5 — Global Aerospace Component Supplier: Jiangsu Liangyi supplied Custom 450 forged hollow bars to a global aerospace component supplier. The XM-25 forged steel parts were used in aircraft structural connectors, meeting AMS 5773E standards with a Charpy impact value up to 85 J and full aerospace quality certification.
Custom 450 (UNS S45000) Material Properties & Advantages
Custom 450—also known as XM-25, UNS S45000, and Alloy 450—is a martensitic age-hardenable stainless steel whose unique properties make it the best choice in many industries:
- Same corrosion resistance as AISI 304 stainless steel — this is why it is better than 410 SS
- Moderate strength better than annealed 410 stainless steel
- Yield strength above 100 ksi (689 MPa) in the annealed condition
- Good fabricability and machinability in both annealed and aged conditions
- High strength, ductility, and toughness with a single-step aging treatment
- Suitable for high-stress, corrosive industrial environments (power generation, nuclear, chemical)
Custom 450 Melting & Heat Treatment Specifications (XM-25, UNS S45000)
Jiangsu Liangyi strictly performs all melting and heat treatment to make sure every Custom 450 (XM-25, UNS S45000, Alloy 450) forged steel product can work consistently and reliably.
Melting Process (Per AMS 5773E)
All Custom 450 forged steel is produced following the AMS 5773E steps:
- Primary melt: Basic electric furnace (EAF)
- Secondary melt: Electro-Slag Re-Melt (ESR) or Vacuum-Arc Re-Melt (VAR)
- Ensures ASTM E45 Method D cleanliness: max inclusion rating 2 (thin) / 1½ (heavy)
- Prior austenitic grain size: ASTM No. 5 or finer (per ASTM E112)
Standard Heat Treatment (XM-25, UNS S45000 per AMS 5773E)
- Solution treatment: 1040°C ±15°C — hold 45 min minimum to 2.5 hrs maximum — forced air cool or water quench
- Straightening: Performed post-solution treatment, pre-aging
- Aging treatment: 575°C ±5°C — minimum 4.0 hours hold — air cooled
- Stress relief annealing (if required): Minimum 10°C below maximum aging temperature, but no lower than 540°C
- All temperatures refer to the metal temperature at the center of the heaviest section, controlled via load thermocouples
- Heat treatment time is adjustable to meet different material requirements
Mechanical Properties at Room Temperature (23 ± 5°C)
We will do strict longitudinal tensile, hardness, and impact testing at room temperature (23 ± 5°C) for all Custom 450 forged steel parts. Minimum property requirements per AMS 5773E are:
| Mechanical Property | Requirement (Custom 450 / XM-25 / UNS S45000) |
|---|---|
| Ultimate Tensile Strength (Rm) | 965 – 1,210 MPa |
| Conventional Yield Strength (Rp0.2) | Min 830 MPa |
| Elongation (A) | Min 16% |
| Reduction of Area (Z) | Min 50% |
| Brinell Hardness | 302 – 363 HB |
| Room Temperature Charpy Impact | Min 68 J |
Chemical Composition (wt.%) — Custom 450 / XM-25 / UNS S45000
| Element | Specification | Element | Specification |
|---|---|---|---|
| Carbon (C) | 0.025 – 0.050 | Columbium (Nb) | 0.30 – 0.50 (8×C min.) |
| Manganese (Mn) | Max 1.00 | Vanadium (V) | Max 0.10 |
| Phosphorus (P) | Max 0.025 | Nitrogen (N) | Max 0.03 |
| Sulfur (S) | Max 0.005 | Silver (Ag) | Max 0.005 |
| Silicon (Si) | Max 1.00 | Lead (Pb) | Max 0.005 |
| Nickel (Ni) | 6.00 – 7.00 | Tin (Sn) | Max 0.05 |
| Chromium (Cr) | 14.00 – 16.00 | Aluminum (Al) | Max 0.05 |
| Molybdenum (Mo) | 0.50 – 1.00 | Iron (Fe) | Balance |
| Copper (Cu) | 1.25 – 1.75 | — | — |
Custom 450 vs. Other Stainless Steels — Material Comparison
The following table compares Custom 450 (UNS S45000) against commonly used stainless steels to help engineers select the best material for their uses:
| Property | Custom 450 (UNS S45000) | 17-4 PH (UNS S17400) | 304 SS (UNS S30400) | 410 SS (UNS S41000) |
|---|---|---|---|---|
| Steel Type | Martensitic PH | Martensitic PH | Austenitic | Martensitic |
| Tensile Strength (aged) | 965–1,210 MPa | 930–1,310 MPa | 515–700 MPa | 480–760 MPa |
| Yield Strength (aged) | Min 830 MPa | Min 725 MPa | 205–310 MPa | 275–415 MPa |
| Corrosion Resistance | Equivalent to 304 SS ✅ | Between 410 and 304 | Excellent (reference) | Moderate |
| Charpy Impact | Min 68 J ✅ | Min 27 J | >100 J | ~20–40 J |
| Weldability | Good | Good | Excellent | Fair |
| Heat Treatment Steps | 1 step (single aging) ✅ | 1 step | Annealing only | Quench + temper |
| Best For | Nuclear, Power Gen, Aerospace requiring high toughness + corrosion | High-strength structural aerospace parts | General corrosion-resistant applications | General high-strength, lower corrosion demand |
Custom 450 Forged Steel Quality Control & Testing
Jiangsu Liangyi will make a full quality inspection on every Custom 450 (XM-25, UNS S45000, Alloy 450) forged steel product shipped — including batch-level testing and full inspection documentation — to make sure good material traceability for our clients.
Microstructure & Cleanliness Testing
- Cleanliness inspection per heat treatment batch — per ASTM E45, Method D
- Maximum allowable inclusion rating: 2 (thin inclusions), 1½ (heavy inclusions)
- Uniform microstructure (non-uniformity); maximum delta ferrite content tested by magnetic particle testing per Annex A & B
- Grain size tested per ASTM E112: average prior austenitic grain size ASTM No. 5 or finer (ASTM No. 3 grains permitted only if surrounded by finer grains)
Full Inspection Report (Included with Every Order)
To make sure good transparency and traceability for all clients, every order is shipped with a full inspection report including:
- Detail numbers: order, drawing, specification, and method references
- Heat number, chemical analysis (heat + product level), and melting method certificate
- Heat treatment certificate — including cooling method, temperature, hold time, re-treatment records, and a graphic temperature-time curve
- Nondestructive testing (NDT) records and NDT inspector certification
- All mechanical test results — tensile (Rm, Rp0.2, A, Z), Brinell hardness, Charpy impact
- Size and surface inspection reports with cleanliness testing
- Deviation reports, if needed
Frequently Asked Questions — Custom 450 Forged Steel (XM-25, UNS S45000)
Custom 450 (also known as XM-25, UNS S45000, and Alloy 450) is a martensitic age-hardenable stainless steel. It has the same corrosion resistance as 304 stainless steel, a yield strength above 689 MPa (100 ksi) in the annealed condition, and good machinability — making it the best material for power generation, nuclear, aerospace, and chemical industries where both strength and corrosion resistance are required.
Both Custom 450 (UNS S45000) and 17-4 PH (UNS S17400) are martensitic precipitation-hardening stainless steels, but they differ significantly: Custom 450 contains 6–7% Ni and has the same corrosion resistance as 304 SS, making it better for corrosive environments such as nuclear and chemical plants. It also has higher toughness, with a Charpy impact value of min 68 J versus min 27 J for 17-4 PH. 17-4 PH can get higher peak tensile strength in the H900 condition.
Jiangsu Liangyi's Custom 450 forged steel is manufactured to ASTM A564 (also known as XM-25), AMS 5773E, ASME, ISO 9001:2015, and CE. Products can also be manufactured to client-specific technical requirements upon request, with full inspection certification provided for every order.
Jiangsu Liangyi can make Custom 450 (UNS S45000) open die forgings and seamless rolled rings from 30 kg to 30,000 kg per piece, with an annual manufacturing capacity of 120,000 tonnes. Available shapes include round bars, square bars, flat bars, seamless rolled rings, hubs, housings, discs, blocks, pipes, tubes, and fully custom shapes per clients' drawings.
Standard Custom 450 forgings: 2–4 weeks. Fully custom parts: 4–6 weeks — faster than the industry average. Rush orders are acceptable if needed. Jiangsu Liangyi ships worldwide via sea freight, air freight, or DHL/FedEx express.
Custom 450 forged steel at Jiangsu Liangyi is produced via a basic electric furnace (EAF) as the primary melt, followed by Electro-Slag Re-Melt (ESR) or Vacuum-Arc Re-Melt (VAR) as the secondary melt, according to AMS 5773E. This dual-melt treatment makes sure cleanliness per ASTM E45 Method D (max inclusion rating: 2 thin / 1½ heavy) and prior austenitic grain size of ASTM No. 5 or finer.
Yes. Jiangsu Liangyi has successfully supplied Alloy 450 (UNS S45000) seamless rolled rings and pressure parts for nuclear power plants in the Middle East. Nuclear-grade Custom 450 parts meet ASTM E45 Method D cleanliness, get ASTM No. 4 or finer prior austenitic grain size, pass full third-party NDT inspection, and ship out with full material traceability documentation.
Jiangsu Liangyi Co., Limited holds ISO 9001:2015, ASME, and CE certifications. Each Custom 450 (XM-25, UNS S45000) order is shipped with a full inspection report including: heat number, chemical analysis (heat + product level), melting method certificate, heat treatment certificate with temperature-time curve, NDT records, mechanical test results (tensile, hardness, Charpy impact), and size inspection reports.
Why Choose Jiangsu Liangyi? — Top Custom 450 Manufacturer in China
There are many Custom 450 manufacturers in China, Jiangsu Liangyi has been selected as the trusted long-term partner by clients from over 20 countries. Our main advantages in supplying Custom 450 (XM-25, UNS S45000, Alloy 450) forged steel are as follows:
- 25+ Years of Specialized Experience: We have been producing Custom 450 / XM-25 / UNS S45000 / Alloy 450 open die forgings and seamless rolled rings since 1997.
- Strictly according to International Standards: All products are as per ASTM A564 (XM-25), AMS 5773E, and client-specific technical requirements.
- Full Customization: Custom shapes, sizes, and heat treatment parameters available for every order, per client drawings and technical manual.
- Good Traceability: Full inspection reports with batch-level testing, material heat numbers, and traceability documentation for all global buyers.
- Fast Delivery: Standard lead time of 2–4 weeks for Custom 450 forgings, shipping to Europe, North America, Southeast Asia, Middle East, Australia, and worldwide.
- Dual-Melt Quality Assurance: ESR/VAR secondary melt treatment makes sure good internal cleanliness and consistent grain structure for every heat.
Contact Jiangsu Liangyi today. Whether you need a Custom 450 material quotation, detailed technical specifications, or engineering support for your XM-25 / UNS S45000 / Alloy 450 forged steel project, our team is ready to assist you at any time.